Scientists have found that the Milky Way galaxy spins faster and has more mass than previously thought, with a size rivaling that of neighboring galaxy Andromeda. Astronomer Mark Reid of the Harvard-Smithsonian Center for Astrophysics discusses the new measurements.

Yeast, hops, grain and water all need to combine with biology, chemistry and physics to make a great glass of beer. Charlie Bamforth, University of California, Davis professor of brewing science and author of the new book Beer Is Proof God Loves Us, offers a toast to honor the beverage.Â» E-Mail ThisÂ Â Â Â Â» Add to Del.icio.us

The television series Cosmos, which first aired 30 years ago this week, made a celebrity of science communicator Carl Sagan. In this archival 1994 Science Friday interview, Sagan discusses his book The Pale Blue Dot and shares his thoughts on manned space exploration.Â» E-Mail ThisÂ Â Â Â Â» Add to Del.icio.us